Call waiting Google Duo Questions › Category: Video › Call waiting -1 Vote Up Vote Down Tjb asked 3 years ago If I’m on a video call and someone tries to call in, will it alert them that I’m on another call or will they get a busy signal? 1 Answers 1 Vote Up Vote Down Best Answer admin Staff answered 3 years ago Hey there, Most likely they will get a “unavailable” message if you are on a call.